Pregnancy3rd TrimesterBody Functions ASK: What are the physical changes that happen in my body during the third trimester? By Christine Stothers, CPM By viewing this content you are agreeing to our Terms of Service Share RELATED ARTICLESMORE FROM AUTHOR 3rd Trimester ASK: How can I get better sleep while in my third trimester of my pregnancy? 3rd Trimester ASK: I think I lost my mucus plug. How do I know when I lose it? What is a mucus plug?